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Rerank 2.5 lite

Model family: Rerank
rerank-2.5-lite is a latency-optimized reranker from Voyage AI's rerank-2.5 series. It takes a query and a set of candidate documents and outputs relevance scores to re-order results for improved retrieval accuracy. The model supports a 32K token context window, double that of its predecessor rerank-2-lite and 8x that of Cohere Rerank v3.5, enabling reranking of longer documents without truncation. A key addition is instruction-following: users can append natural language instructions to their queries to define relevance criteria, specify document types, or disambiguate queries. Evaluated across 93 retrieval datasets spanning 9 domains and 31 languages, rerank-2.5-lite outperforms Cohere Rerank v3.5 by 7.16% and beats Qwen3-Reranker-8B despite being over an order of magnitude smaller. On the MAIR instruction-following benchmark, it outperforms Cohere Rerank v3.5 by 10.36%. Available via API with token-based pricing.
Text Gen 7
Released: August 11, 2025

Overview

A latency-optimized reranker that refines retrieval results with instruction-following capabilities. Supports a 32K token context window, works across 31 languages, and outperforms larger open-source rerankers. Users can steer relevance scoring using natural language instructions appended to queries.

Pricing

Compare Rerank 2.5 lite with other models listed in the same vendor pricing tiers and context lengths.

Tier

Standard

Model Input Cached input Output Unit
rerank 2.5 Voyage AI
$0.05 - $0 per 1M tokens
Rerank 2.5 lite This model Voyage AI
$0.02 - $0 per 1M tokens
Voyage 4 Voyage AI
$0.06 - $0 per 1M tokens
Voyage 4 large Voyage AI
$0.12 - $0 per 1M tokens
Voyage 4 lite Voyage AI
$0.02 - $0 per 1M tokens
Voyage code 2 Voyage AI
$0.12 - $0 per 1M tokens
Voyage code 3 Voyage AI
$0.18 - $0 per 1M tokens
Voyage context 3 Voyage AI
$0.18 - $0 per 1M tokens
Voyage finance 2 Voyage AI
$0.12 - $0 per 1M tokens
Voyage law 2 Voyage AI
$0.12 - $0 per 1M tokens
$0.12 - $0 per 1M tokens
$0.12 - $0 per 1M tokens
$0.12 - $0 per 1M tokens

About Voyage AI

Voyage AI provides best-in-class embedding models and rerankers for search and retrieval over unstructured data, used to power retrieval-augmented generation (RAG) and AI applications. It offers general-purpose, domain-specific (finance, legal, code) and company-specific fine-tuned models. Founded in 2023 and based in Palo Alto, the company was acquired by MongoDB, Inc. in February 2025 and now operates as a MongoDB subsidiary.

Industry: Artificial Intelligence
Location: Palo Alto, California, US
View Company Profile
Last updated: June 24, 2026
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